Record changer phonograph



RECORD CHANGER PHONOGRAPH Filed Nov. 29, 1944 '7 Sheets-Sheet 1 March20, 1951 K. R. BENDER RECORD CHANGER PHONOGRAPH Filed Nov. 29, 1944INVENToR. He/zeLR-Bemdew a m l :y 5

JIEOTGT March 20, 1951 Filed Nov. 29, 1944 7 Sheets-Sheet 3 E W m m s,SMQ @E (/S; f L w, @mt/b5 w M w aS, /Ia

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March 20, 1951 K, R, BENDER 2,545,643

RECORD CHANGER PHONOGRAPH' Filed Nov. 29, 1944 l'7 Sheets-Sneek 4INVENTOR. felUle/'erwlew March 20, 1951 K. R. BENDER 2,545,643

RECORD CHANGER PHoNoGRAPR 7 Sheets-Sheet 5 Filed Nov. 29, 1944 March 20,1951 K, R, BENDER 2,545,643

RECORD CHANGER PHONOGRAPH Filed NOVY. 29, 1944 '7 Sheets-Sheet 6 March20, 1951 K. R. BENDER RECORD CHANGER FHONOGRAPH '7 sheets-sheet '7 FiledNov. 29, 1944 INVENTOR.

w ,m a B. H h d ,n L fm e fr Patented Mar. 20, 1951 UNITED STATES `VPATENT oFFlcE Escono CHANGER PHONOGRAPH Kenneth It. Bender, Elizabeth,lN. J., assi'gnor to General Instrument4 YCorporation', Elizabeth, N. J.,a corporation of New Jersey Application November 29, 1944, serialNo.565,588

I 19 Claims.

-. This invention relates to a record changer phonograph land moreparticularly to a record .changer phonograph of the type in which aplurality Aof records are stacked above the turn- -table and areindividually fed therefrom to the turntable by releasing the bottomrecord of the stack.

- In record changer phonographs of this character, mechanism is providedautomatically actuatable when theplaying of one record is com- ,pletedfor carrying out the following sequence fof operations: Lifting thereproducer or tone 'arm from the played record, shifting the tone .armto clear the record area, feeding a new record from therecord stack onto the played record (or onto the turntable when no record has as yetbeen played), returning the tone arm to -a. starting position over thenew record, and

lowering the tone arm on to vor adjacent the starting groove of the newrecord. Records commonly used in practice are of different sizes:or-,diameters and those most commonly employed are 10'?, and 12rdiameter records. Mechanism `for automatically effecting a record changeis customarily designed and constructed so that the phonograph may beused for both 10 or .12 records.

This operation and these requirements impose certain limitations in thedesign of such a reoord changer phonograph, with the result that theapparatus employed is comparatively complicated and composed of numerousparts complexly interrelated.

'Itjis a prime object of my present invention to provide a new recordchanger phonograph of this character embodying in addition to new andimproved operating features and characteristics an overall simplifiedconstruction so that a generally low cost machine is obtained which may-be eieiently operated, easily repaired and readily maintained.

The principal improvements in a record `changer of this type supplied bymy present invention are the following:

1. The machine embodies mechanism for determining the-position of andfor positioning the tone arm in the following three positions: astartingposition for a large record when large records are being supported inand supplied from the magazineof the machine, a starting posivtion .fora small record when small lrecords are `being supported in and suppliedfrom the magagzine, and an initial or stopping position when -there isno record in, as when the supply of recaords; has been depletedl fromthe magazine.

2. The machine embodies mechanism for stop ping the operation of themachine motor after the last record of the magazine stack has been fedto the turntable and played.

3. The provision of a machine embodying such mechanism in which themachine may be set intoy operation by merely manually moving the tonearm to record starting position.

4. The provision of such a machine embodying this mechanism in whichthemachine may "be set into operation either by manually moving the tonearm to record'starting position provided that there is a record on theturntable or by simply depressing the tone arm in its initial or` stopposition, provided, however that Itherev is a record in the magazine tolbe played.

5. The provision of a record changer phonograph of this type which maythus be readily adjusted by the user Ifor theA operation of dilerentsize records such as 1'0" and 12" records, in

which the machine may thus be set into operation'by the most simple andnatural movements of the tone arm,l in which the machine willautomatically stop when all of the recordsin the magazine have been fedand played, and in which all of these operations are fool-proof andcarried out by a machine of exceedingly simple design. Y

ToV the accomplishment of the foregoing and such other objects as mayhereinafter appear,

.my invention resides in the phonograph com binations andsubcombinations and the novel elements thereof as sought to be delinedin the appended claims and as described in the following specificationtaken together with the 4accompanying drawings.

In the drawings; Fig. 1 is a top plan View of the phonograph of thepresent invention; l v

Fig. 2 is; a front elevational View thereof with part of the housingplate broken away to re- Veal the operating parts thereof; Y Fig. 3 is abottom plan view of the phono- .graph as viewed when the same is rotated189 around the axis 3, 3 of Fig. 1; y

Fig. 4 is a similar view thereof with some of the parts removed;

Fig` 5 is a view similar to those of Figs. '31 and A 4 drawn to anenlarged scale and showing, in the normal inoperative condition, thefollowing parts of` the machine: the switch mechanism,` vthe sweep arm,the stop lever, the cam pin and the :control lever;

- Fig. 6` is avview shown on an enlargedscale taken y,in cross-sectionin the, plane of the line 6, 6 of Fig. 1 with the record supportingmeans moved, however, to position to support large size records;

Fig. 7 is a perspective view depicting the relation between the controlmember and the stop lever of the machine, the swing arm cam followerbeing also shown;

Fig. 8 is a detail view of the record supporting member or plate of themachine in position for supporting large size records, the view beingtaken in cross-section in the plane of the yline 8-8 of Fig. 6;

Fig. 9 is a perspective fragmentary View of the machine showing the tonearm and the record support and record engaging means;

Fig. 10 is a view featuring the tone arm support and operating meanswith parts shown in section;

Fig. 11 is a perspective View of the switch mechanism of the machine;

Fig. 12 is a perspective exploded view of the trip or initiatingmechanism of the machine;

Fig. 13 is a top plan view of the main cam of the machine;

Fig. 14 is an elevational view of the main cam with a part broken away;

Fig. 15 is a top plan view depicting the relation between the apparatusshown in Fig. 5 and the main cam shown in Fig. 13 and showing theseparts in a different operating position when compared with Fig. 5;

Fig. 16 is a view similar to Fig. 15 and showing the parts in anotheroperating position; and

Fig. 17 is a view of parts shown in Fig. 16 showing certain partsthereof in still another position of operation.

General organization of the machine Referring now more in detail to thedrawings, and having reference rst to Figs. 1 and 2 thereof, thephonograph in its general organization comprises a housing plate orsupport A which supports all of the par-ts of the machine, a recordturntable B rotatably mounted thereon, a reproducer or tone arm Cmounted thereon and movable between the full and dotted line positionsshown in Fig. 1, a centrally arranged record support and feeding meansD, an edge record supporting means and record engaging member designatedtogether as E, all mounted on the top of the housing plate A, and theoperating and controlling a.Pparatus for the phonograph, generallydesignated as F, mounted on the underneath side of the housing plate.

The turntable B may comprise an inverted dished member 20 surfaced witha suitable frictional material and provided with a hub 2l rotatablyreceived by a spindle sleeve 22 which is fixed to the housing plate A bymeans of a nut 23 and the threaded lower end 24 of said sleeve (see Fig.6). The turntable is directly rotated from an electric motor 25 mountedon a plate 26 and xed to the housing plate A (see Fig. 3), said motorprovided with the field coil 21 having its extending rotor wheel 28engaging a friction such as a rubber-faced wheel 29 which latter is inengagement with the interior rim 3D of the turntable. Upon energizationof the motor the turntable is thus rim rotated in the arrowed directionshown in Fig. 1 of the drawings. The other operating and controllingmechanism of the phonograph, all employed during a record changingcycle, lis operated by the rotation of the turntable by means of afriction wheel 3l normally out of engagement with the turntable rim 30,as shown Cil in Fig. 1, and tripped into turntable rim engagement, asshown in Fig. 3, when a record changing cycle is initiated and held insuch engagement for the period of this cycle.

The reproducer or tone arm C is mounted as usual for movement aboutvertical and horizontal axes. As shown in Figs. 1 and 10 of thedrawings,

the tone arm C is pivotally mounted on a bracket 32 on a pivot pin 33for movement thereon about' a horizontal axis, the weight of the armbeing relieved by a spring 34 encircling the pivot pin.

The bracket 32 is rotatable about a vertical axis by means of a sleeve35 (see Fig. 10) attached thereto and extending through an elevatingcasing :i6 and the casing plate A, the said bracket 32 being alsopreferably mounted for rotation on the ball bearings 3T.

The record supporting means-The magazine The magazine of the machinecomprises means for supporting a stack of records above the turntable,from the bottom of which stack the individual records are fed to theturntable during va record changing cycle. The record supporting meanscomprises a spindle support for supporting the record stack at itscenter and a record supporting plate for supporting the record stack atan edge thereof. The records are individually fed from the bottom of thestack by means embodied in the central spindle support.

Referring now to Fig. 6 of the drawings, a 'stack of records G is shownsupported centrally on a button 38 mounted at the top of the spindlesleeve 22 and peripherally by a supporting plate 39. Associated with thesupporting plate 39 is a record engaging member 40 for engaging andvfol-- lowing the movement of the top record of the stack G, the saidmember 'being provided at its engaging end with a record engaging buttonM.

The record supporting plate 39 is movable between the positions shown inFig. 1 and Fig. 8 for respectively supporting different .sized recordssuch as 10" records and 12"' records. The rec ord engaging member 49, infollowing the movement of the top record of the stack, moves betweenrecord engaging positions, as indicated in dotted lines in Fig. 6 whenany one or more records is in the magazine, to a non-engaging positionindicated in full lines in Fig. 6 when no record is present in themagazine as when the last record of the stack has been fed to theturntable.

This record supporting means is so constructed and designed that whenlarge records are being supported in and supplied from the magazine thetone arm C will be positioned during a record changing cycle forengaging the starting groove of a large record, when small records arebeing supported in and supplied from the magazine the tone arm C will bepositioned during such a record changing cycle for engaging the startinggroove of a small record, and so that when the supply Aof records hasbeen depleted from the magazine the tone arm during the next changingcycle will be moved to and held in its initial or stopping position sothat the machine may be conditioned for being automatically stopped.

To accomplish these results the record supporting plate 3Q, shapedas-shown in Fig. 8, is movable between the position shown in Fig. 1 forsupporting small records to the position shown in Figs. y6 and 8 forsupporting largevrecords, the said record supporting plate beingrotatably mounted on a Xed post 42 extending above the elevating housing35 and secured at its bottom, as at 43, to the housing plate A. Theplate 39 is formed with a depending lug Gtr cam-faced at its bottom forengaging a rod- 45- slidably mounted at itsv ends inthe post 4'2 and theplate A. The rod 45 is provided near its bottom with a washer tengageable with the underneath wall of the plate A for limiting theupward movement thereof. When the supporting plate 39 is moved to theposition shown in- Figs. 6 and 8 for supporting large records, the camlug ad engages the rod 5 to move the same to the position shown in Fig.6. When,

, however, the supporting plate i is moved to the position shown in Fig.l for supporting, small records, the cam lug E4. is moved out of therange of the rod to permit freedom of upward movement of this rod. Forlimiting the rotation of the supporting plate, stopping the same in thetwo positions shown respectively in Figsv l and 6, stop screwsk land d5threaded into the post t2. (see Fig., 8) project into the post so as tobe engagedA by the. sides of the cam. lug te, as clearly pictured inFig. 8.. This rod t5 may be briefly referred to as. the record sizeselector rod, its movement and itsv operatic-nv ofV control means to be4described hereinafter', being responsive toy the position to which the.record supporting member 39 is manually moved for.V supporting thedifferent size. records.

The record engaging member im is mounted for movement about a horizontalaxis on the cylindrical mount or bracket 49 by means of the pivot pin5G, a spring 5i encircling said pivot pin. functioning to urge themember it from an elevated record engaging position to a depressed andnally non-engaging position, both shown in Fig. 6. The mount 49 isitself rotatable about a vertical axis so that the member it may bemoved from the operative positions: shown in Figs. 1 and 6 to aninoperative out of theway position (to permit loading and unloading ofthe records in the magazine), the mount #i9 is accordingly rotatablymounted on a thimble 52 and a collar 5t secured to the thimble by meansofv a set screw 5&1', the mount beingY provided with a screw 55 whichenters and moves in an arcuate slot formed in the collar 53. Thethimbl'e 52 is in turn iixed to the post 42 by being threadedly mountedin the post and secured in adjusted position by means of a set screw5ft', all as best shown in Fig. 6'. Coop erating with the verticalmovement ofthe record engaging member is a rod 56- slidablymounted inthe thimble 52 and provided at its top with a bent end 5T which isadapted to be engaged by a part 58 of the member it when the lattermoves to its descended non-record-engaging position; atr all. othertimes the rod T5 is free to move upwardly in its thimble support'. Thisrod 5t being thus responsive to the movement of the record engagingmember from a record engaging to a non-engaging position, and beingutilized for translating this to an operation to automatically stop themachine after the last record has been played may be briefly referred toas the automatic shut-off rod.

The central record support includes a spindle cap 59 fixed to shaft et'which is eccentrically mounted in the spindle sleeve 22 whereby the capmay be moved from the eccentric position, shown inFigs'. l and 6, toaposition concentric with the sleeve 22. In its eccentric position thecap 5t receives the record stack G, the bottom-most record of whichrests on the button 38. For removing a played stack of recordsfrom'the'turntable the spindlecap 59 is moved to its concentric positionfthe record' engaging member le being first prefgemaakte the recordfeeding means.

erably moved tol its out of the. way or inoperative' position). Forholding the spindle cap 59 in its two posi-'tions a collar 6l is fixedto the. bottom end of the eccentric shaft til?, they collar beingrecessed.

'at diametrically opposite points. for engagement by` a spring t2 (seeFig. 3), the spindle cap 5i)v being thus held in its two oppositepositions by means of this engagement.v

The record feeding means is of a type known in the. art and isassociated with the central spindle support. This record feeding meanscom,- prisesr thetop. button 38y which isy fixed to a sleeve te (see:Fig'. 4) which sleeve surrounds the shaft andis thereforevveccentrically mounted in the spindle sleeve 2.2-. Tol thelower end of.this sleeve is fixed an arcuate pinion 54 (see Figs` 3 and ,4).Impartingan oscillating cycle to this piniony (the oscillation beingover moves the button4 38 through a corresponding oscillating. cycle.When this takes place the button 38 moves from. its record supportingposition,` shown in Fig. 6, to a position 180 therefrom and concentricwith the spindle cap 59. The record stack therefore drops a distanceequal to the thickness of thev button 3B (the thicknessy of a record)and is supported in position by the lowermost record engaging the to-pshoulder 65 of the. sleeve 2i?. The button 38 is thus located within thehole of the bottommost record. Completing the oscillating cycle, thebutton 38 moves back to its Fig. 6v position land thereby moves thelowermost record to a position concentric with theY spindle sleeve 22;this lowermost record, being thereby freed at its periphery or edge fromthe supporting plate 39, drops from the magazine. onto the turntable ora. previouslyv played record thereon. The button 3S in this last cycleof its movement also interposes itself asa support for the remainingrecords in the stack with the result that the remaining records, arethen supported in the condition shown in Fig. 6.

The mechanism for producing a record changing cycle In record changingphonographs of this character, mechanism is provided automaticallyactuatable when the playing of one record is completed for carrying outthe following sequence of operations: lifting the reproducer or tone armfrom the played record, shifting the tone arm to clear the record area,feeding a new record from the record stack. onto the played record oronto the turntable, returning the tone arm to a starting position overthe new record, and lowering the tone arm onto or adjacent the startinggroove of the new record. This sequence of operations, once set intomotion by suitable tripping or initiating means, is carried out by amain cam and' mechanism connecting this main cam to the record feedingmeans and to the tone arm.

This main cam is separately shown in Figs. 13 and 14 of the drawings andcomprises a disc cam member @t peripherally toothed as at 67 for camdriving purposes and formed on its top and bottom sides with suitablecam parts. The top side of the cam is formed near its periphery with acircumferential cam face E8 which functions for causing the lifting anddescending movements of the tone arm, and is formed interiorly with acam element 69 which functions for effecting the described shiftingmovements of the tone arm. On its opposite side the cam 68 is formedcentrally with a cam face 'Ill which functions to. operate The cammember 66 has also attached thereto a small cam member 'H whichfunctions in conjunction with the tripping or initiating means to bedescribed. Attached to the top side of the cam '56 and extending overthe area defined by the circular rib l2 thereon is a spring 'i3 anchoredas at 'M and adapted to be moved from the full-line position shown inFig. 13 to the two dotted line positions shown. Attached to the top sideof the Cam, and at a point in circumference of the rib 12, is a pin l5which cooperates with the tripping means of the machine as will be seenhereinafter.

v The record feeding means described is operated by the cam element 'lilwhen the cam 66 is moved through its cycle of movement (one completerotation) by means of a lever 7B (see Figs. 3 and 6) fulcrumed at ll,one arm 'i8 of which is provided with a pin-shaped cam follower i9engaging the cam element lil, and the other arm 8B of which is toothedat its periphery 8l for engagement with the pinion 513. A spring 82connected to the level' l@ moves the same into cam engaging position.When the cam 65 moves through a rotation cycle, the lever lt isoscillated (when the tone arm has first been shifted to its initialfull-line position shown in Fig. 1) for oscillating the eccentric button38 of the record feeding means, thereby feeding the lowermost record ofthe stack to the turntable.

For causing the lifting and descending movements of the tone ar .i thereis provided a rod 83 slidable in the tone arm bracket sleeve 35, thelower end Gli of which forms a cam follower, and the upper bent end S5of which is adapted to engage the inner wall of the tone arm C. The cam66 is so mounted that in its rotation its peripheral cam face 68 ridesunder the rod cam follower S4 (see, for example, Fig. 14). The cam face68 from a depressed part rises at opposite ends to an elevated part 582.Normally the parts are in the position as shown in Fig. 14, the tone,`arm being in its lowered operative position. When the cam G5 is movedthrough a rotatingcycle, moved in the clockwise direction depicted inFig. 13, the cam follower 8d rides to the elevated portion of the camface t8, thus lifting thetone arm from its engagement with a playedrecord and maintains the tone arm in this lifted condition until thetone arm has been shifted by the means, presently to be described, toits record starting position (if there is a record to be played), themovement of the rod cam follower from the elevated to the depressed camposition then functioning to drop or lower the tone arm onto or adjacentthe starting groove of a new record.

For causing the shifting movement of the tone arm there is secured tothe bottom of the tone arm sleeve 35 a sweep arm S5 secured thereto bymeans of a bracket 8l (see particularly Fig. 1G), the said sweep arm,shaped as best shown in Fig. 5, being provided with a cam follower pin88. This cam follower pin is moved by the cam element BQ, from theterminal playing position shown in dotted lines in Fig. l, to theinitial position shown in full lines in this figure, and then to arecord starting position (if a record is on the turntable), the springi3 of the cam, together with other controlling means, acting todetermine any one oi' three positions into which the tone arm may bemoved, as will be further described hereinafter. It may be stated herethat when the playing of a record has been finished and the sweep arm8&5 is in its innermost position, a rotation cycle of the main cam 66causes the be described. The sweep arm 86 is desirably assisted in itsinward swinging movement by means of a spring 89 connected thereto.

Controlling mechanism for determining tone arm' position The machineembodies controlling mechanism for determining the position of and forpositioning the tone arm during a record changing cyclej in thefollowing three positions: a starting position for a large record whenlarge records are being supported in and supplied from the maga-A zineof the machine, a starting position for aI small record when smallrecords are being supported in and supplied from the magazine, and

an initial or stopping position when there is no' record in, as when thesupply of records has been depleted from the magazine.

The controlling mechanism for accomplishing this is best shown in Figs.3 to 7 of the drawings. Fig. 5 shows the same schematically when theparts are in a normal position (when the main cam is at rest) and Figs.3, 4, 6 and 7 show the condition which these parts assume immediatelyafter the main cam has been set into its cycle of rotation, in theabsence of any more records in the magazine.

Referring rst to Fig. 5 ofthe drawings 'which' show the parts Vin anormal rest position, the controlling mechanism comprises a stop memberin the form of a stop lever 98, fulcrumed as at 9|, provided with a stoparm 92 and with a camoperated arm 93 with which is associated acontrolling member in the form of a control lever 94 fulcrumed at 95 andproviding the positioning arm 96 and an operating arm 97.

lThe main cam pin 15 normally assumes the full-line position shown inFig. 5, and in this position the pin is in engagement with a lip 98formed in the stop lever arm 93. rIowards the end of a cycle rotation ofthe cam the cam pin l5 moves in the arrowed direction from the dotted tothe full-line position shown in Fig. 5, and by its engagement with thelip 98 moves the stop lever to its outermost position, as shown, againstthe action of a tensioning spring 99. The arm 92 of the stop lever isformed with three stop depressions a, b, c, each adapted to be engagedby the sweep arm pin 3S, depending upon the position assumed by the stoplever, such engagement functioning to intercept and stop the sweep armand thereby the tone arm in its inward sweep. Normally these parts areout of engagement, as shown in Fig. 5.

The control lever arm 96 is formed with the stepped part l providing thethree steps a', b and c', also well shown in Figs. 6 and 7 of thedrawings. These three stepped parts are adapted to be selectivelyengaged by the stop lever 99 at a position indicated as X thereon. Thecontrol lever 94, pivotally mounted on a bracket HH (see Fig. 6), isoperated by the rods 45 and 55 of the record supporting means into anyone of three positions corresponding to the interposition of the stepsa', b and c thereof to the movement of the stop lever 913, therebydetermining the zine both actuating rods 45 and 5t are free to' moveupwardly in their mounts andare so moved bythe engagement at the lowerends thereof by the arm 91 of the control lever 94, the arm directlyengaging the rod viii and an adjustable screw I 02 engaging the rod :56,the parts being moved by a spring |03 which is carried by the pivot pin95, the control lever 96 being moved in this instance to a positionwhere the step a' is in a position to intercept the stop lever. When thestop lever is so intercepted the stop groove qfvthereof is in a positionto intercept the sweep arm pin 88 and thus to intercept the tone arm ina starting position for small records. When `large records are being.supported in and supplied from the magazine the record supporting plate391s moved to its Fig. 8 position, in which event the rod 45 isdepressed to move the control lever 94 so that its step b is inaposition to intercept the stop lever; in this intercepted position ofthe stop rlever `its stop groove is in a position to intercept the sweeparm pin 88 tov stop thesweep arm and its tone arm at the starting`groove for large records. When the last of the `records .in .the stackhas been fed from the magazine and the magazine is depleted, the recordengaging memlber 40 moves to its descended inoperative position shown inFig. v6, .and this movement causes the' shut-off rod 56 to descend andthereby move M"the control lever 94 to the position as shown -in Figs. 6and 7 with the stop c in a position `to intercept the stop lever 99; andin this instance the stop groove c of the lever is positioned tointercept thesweep arm pin 88, and thereby the tone arm, to hold thesame in its outward initial or stopping position.

,A complete cycle of operation of this controlling mechanism may now bedescribed. Be-

fore the operation .of the main cam is linitiated the control member orlever 94 has been selectively moved to one of its three positionscorresponding to a small record, a large record and no record in themagazine. When `the main cam begins its cycle of rotation its pin imoves from the stop lever lip 98 and releases the lever for movement inresponse to the spring 99. 'lhe stop ylever moves in any yone of thethree positions At `this time determined by the control iever. the Astop.lever and lthe lsweep arm are in the `positions as shown, for example,in Fig. 16. The .movement of lthe sweep arm outwardly to tone arminitialposition is permitted by the stop lever, lthe pin 88 at this timeengaging the stop lever in the manner shown in Fig. 17, and moving thestop lever out of :the way, the stop lever immediately moving back toits controlled position .after the pin 88 has passed the same. Assumingthe absence of -a `record in the magazine, the stop lever -90 takes theposition shown in Figs. 3 and 4, the sweep arm being thereby interceptedin its outermost initial or stop position (the c position). The springI3 of the main cam permits this to take place, :this spring beingdepressed by engage- 'vmentwvith the pin 38 into the position c2 shownin Fig. 13. 'The mai-n cam continues its cycle of rotation,k at the endof which the cam pin '15, assuming the dotted line position shown inFig. 5, engages the .lip 98 -of the stop .lever and thereby'moves .thestop lever against the tension spring 99 to its original -or normalposition, as shown in Fig. 5, leaving Vthe tone arm now free to move orbe moved for :any of its further operations. i

With a large record in the magazine, the sweep arm pin 88 is interceptedby the stop groove 'b of .the stop lever, and-in this event, after thesweeparm has been moved by the main cam toits outermost or initialposition, the tone arm is returned to a starting-position for largerecords by the action of the cam spring 13 which assumes the position b2shown in Fig. 13. When the final movement of the cam pin l5 returns thestop lever to its normal Fig. 5 position, the sweep `arm and its tonearm are freed for an inward record playing movement.. With a smallrecord in the magazine the sweep arm pin 88 is intercepted by the lstopgroove a of the stop lever, and in this event, after the sweep arm hasbeen moved .by the main cam to its `outermost or initial position, thetone arm is returned to a starting position for small records by theaction .of the cam spring 13 which assumes the position a2 shown in Fig.`13. Again, when the nal movement of the cam pin '5 returns the stoplever to vits normal Fig. 5- position, the sweep arm and its tone ,armare `,freed for an inward record playing movement.

In the devised construction the stop element c may be eliminated or cut01T `so that in the third or' c position of the control lever 94 thestop lever may then stop against the hub of the :cam 66 as will be clearfrom an .inspection of Fig.. 4 of the drawings. The functioning .of theycombination is the same as just described. The control lever 94 takesits c position `and the stop rlever 90, `when stopped by the hub of thecam, correspondingly takes its c position.

The steps of the stop elements a' and Ab are subtended by short ledgesbest shown in Fig. 701 the drawings which act to latch the control lever-94 against the engaged edge of the stop lever 90 when the machine isabout to be operated to its stopping vor shut-off position. When a lastrecord of the record stack `drops from the magazine the stop lever 90kis in engagement with either of the stop elements a' or b. When the lastrecord drops, the lever 94 will tend to rotate on its pivot or axis toits shut-off or c position but is prevented from so doing until the endof the cycle by the said ledges which are latched against the edge ofthe stop lever 99. It will be understood that without these latchingelements the control lever 94 would rotate at once when the last recorddropped, which would shut oi the mechanism at the end of the cycleWithout playing the last record. A

Switch mechanism, its operation and `cor'Ltrol i The machine embodies 'aswitch mechanism and means for operating and .controlling the same,designed Aand constructed to accomplish the following operativepossibilities with the use ,of relatively simple apparatus: (a) themachine may be set automatically into operation by manually picking upthe tone arm and moving the same to a record starting position providedthat vthere is a record .on the turntable, (b) the machine may also beset automatically into operation by simply depressing the tone arm inlits initial yor stop position, with the normal operation of .themachine continued provided there is -a record :to 'be Vfed to theturntable, and v.(c .the machine will be automatically stopped vafter'the 11 last record of the magazine stack has been fed to the turntableand played.

These operations are accomplished by the provision of a switch mechanismand its combination with the controlling mechanism of the machine, whichis best shown in Figs. and ll oi the drawings, where a switch assemblygenerally designated as H is shown combined with the con- `trollingmechanism and, particularly, the swing arm 85 and the stop lever Se.

The switch mechanism comprises two levers,

lnamely, a lever HB and a lever both fulto the lever expanded conditionshown in Fig. 5, the contracted condition being effected under theinfluence of the tensioning spring H5. Lever carries an electric switchH8 provided with a movable switch operating element H9, and lever I lilcarries on its arm l it a switch operating pin |29. These parts are sorelated that when the levers are moved to the expanded condition shownin Fig. 5 the switch elements are moved relatively to each other in onedirection (indicated by arrows in Fig. 5) to move the switch H8 to theoil position and so that when these levers are moved by the spring tothe lever contracted condition shown in Fig. llthe switch elements aremoved relatively to each other in the opposite direction to move theswitch H8 to the on position.

For operating the switch levers, the lever iiil Ais provided with a camroller |2| journaled on an arm |22 forming part of the lever lill, thecam roller |2| being, however, mounted in its bear- 'ing so as to permitaxial movement thereof and moved to its outward position under theinuence of a. spring |23 housed by the bearing |2i and active on theshaft i 25 of the cam roller; and the lever is provided with a camroller |26 journaled on an arm 2 of said lever. These cam rollers, andhence the levers of the switch mechanism, are operated by the engagementtherewith of parts of the sweep arm 36 and the stop lever 9D. Thus thesweep arm is shaped to provide a cam part |28 for cooperating with thecam roller |26, and the stop lever 93 is shaped to provide a cam part529 cooperating with the cam roller 2 Briefly stated, the essentialcooperation between the lever cam rollers and the cam parts or" thesweep arm and the stop level' is such that the double engagement of thecam rollers by the sweep arm and the stop lever, as shown in Fig. 5 ofthe drawings, is effective for moving the switch assembly to itsexpanded condition, and therefore, for moving the switch to its oilposition, and the disengagement of one of the cam rollers by either thesweep arm cam part or the stop member cam part alone is eiective formoving the switch assembly to a contracted condition, and therefore, tomove the switch to the on position, as is illustrated by the conditionassumed as shown in Fig. ll, or the different condition assumed as shownin Fig. l5 (in which connection see also Fig. 16). These principles willnow be described in connection with the diiferent operatingpossibilities of the' machine,

The levers are movable between L the lever contracted condition shown inFig. ll.

Fig. 5 shows the normal or inoperative coridition of the machine. Boththe sweep armpart |28 and the stop lever part |29 respectively engagethe cam rollers 42e and H2L ln this position the levers HS and iii havebeen moved to the lever expanded condition and the switch i i8 is open.This switch connected in the power circuit in series with the field coil2l' of the -motor by means of the conductors or connecting leads |38 andi3! (see Fig. 3). The circuit to the operating motor is therefore open.The machine, as aforesaid, may be started by lifting the tone arm andpositioning the same at the 'start'- ing groove of a record. Sc movingand iiftin'g the tone arm manually causes the inward movement of thesweep arm B6. As soon as the sweep arm 6 is moved inwardly (see Fig. 5)the sweep arm cam part i28 moves past and releases 'the cam roller |25,permitting the lever Iii to move under the iniiuence of the contractingspring H5 whereby the lever assembly is operated to its contractedcondition (the condition shownin Fig. 11). The switch H is thus operatedto the on position, closing the circuit to the mo'- tor and startingthe' operation of the machine. 'The machinev may also be started bymerely depressing the tone arm when the same is `in its initial positionshown in Fig. l. The tone arm normally rests7 on a reject button |32.This'button is fixed to a pin |33 (seealso Fig. 2) slidably movable in asupport i3d, and the lower end |35 of the pin is adapted to engage theinclined part of a trip bar ISS which is normally moved Ato aninoperative position by means 'of the spring |31. This trip bar ispivotallyconnected'at-'ISS to a lever i39 fulcrumed at |41on the housingplate of the machine, and this lever is provided-f" with a forward campart |4| adapted to engage Vthe cam roller l2! to move the same inwardlyin its axial mounting. The depressionof the tone arm thus moves the tripbar, these vparts operating in the arrowed directions shown in Fig. 1'1,and the lever 39 is thus actuated to move the cam roller |2| axially,thereby freeing the same from engagement with the stop lever cam part|29. As soon as this happens the lever assembly is also moved to itscontracted condition, thereby lmoving the switch to its on positionstarting the phonograph motor. It is this condition and this operationwhich are depicted in Fig. 1l of the drawings. The spring i3? isutilized to restore the reject button and the trip bar to their normalpositions.

This switch mechanism and its control mechanism also operateautomatically to stop the machine after the last record of a Stack hasbeen fed and played, and further operate to otherwise permit continuedoperation of the machine. The operation may be explained by reference toa cycle change, assuming the completion of the playing of a record withone record remaining in the stack to be fed and played. At the end ofthe playing of a record, the sweep arm 8B is in its innermost positionas shown in full'lines in Fig. 16, and the stop arm is in its outermostposition as indicated in dotted lines in Fig. 16, the switch assemblybeing then in its contracted condition with the switch on. As soon asthe main cam moves, the stop lever 90 is springactuated to the positionshown in full lines in Fig. 16, the cam part |28 of the same thusreleasing the cam follower |2| this taking place without, however,changing the condition of the lever assembly. The lever assembly as awhole is A capable of partial rotation on its fulcrum `pin .I l2,

13 assisted iny one direction by a lspring |42 and stopped in bothdirections by a stop pin |43 which engages the angle walls of part ofthe lever i. In the continued rotation of the main cam the sweep arm 86moves from the position shown in Fig. 16 through the position shown inFig'. 17 and to the position shown in Figs. 5 and 15, the cam part |28thereof engaging the cam roller |26, this engagement merely causingtheswitch assembly to move as a whole about its fulcrum pivot from theposition shown in Fig. 16 to that shown in Fig. 15, the on operation ofthe switch being thus maintained. It will be noted that at this time thestop arm 90 is in one of its tone arm .stopping positions. In thecontinued rotation of the main cam the sweep arm is moved .inwardly totone arm record starting position, thus releasing the cam roller |25,the switch assembly as a Awhole thereby returning toits Fig. 16position. In the final increment of operation of the main cam the stoplever is returned to its normal inoperative position, and in its returnits cam part |29 againengages the cam roller |2|, thereby again vmovingthe switch assembly as a whole, and thus without changing the operationof the switch. At

recordstarting' position. At the final increment 'z ofmovement of themain cam the stop .lever is `returned to its normal inoperative positionand,

therefore, .at this time both the sweep arm and the stop lever are intheir inoperative positions shown in `full line in Fig. 5, .and thecarnparts l .thereof both engage the cam `followers of the lever assembly,thereby moving the .leverto its expanded condition and the switch to itsofi position. Thus, after the last record has been played, all of theparts including the tone arm are automatically returned to their initialor stop position and the phonograph motor is automatically turned offand the machine automatically stopped.

The initiating or trip mechanism The initiating `or trip mechanismfunctions to initiate or trip the main cam for .its change of recordcycle. The initiating mechanism is automatically set vinto operationwhen the tone arm reaches the end playing groove of a record, and may bemanually set into operation by the .user actuating the reject buttonwhenever the user desires a change of record. After the main cam has.made .its complete cycle (a full rotation of the cam) the initiating ortrip mechanism is automatically restored, ready for the next trippingoperation.

The initiating or trip .mechanism and its lassociated parts are bestshown .in Figs. 3, 4, .12 and 15 ofthe drawings. The trip .mechanismcomprises a .carrier lever |55 fulcrumed at |5| on the housing Aplate A.and atrip lever |52 pivoted to and .carried by the carrier lever at thepivot axis 53. The carrier lever is vprovided with a bearing |54 in-oneof its arms in which rotates a ilegible shaft |55 carrying at its outerend the rubber Wheel 3| heretofore mentioned which is adapted to beoperated by the turntable rim 30. A tension lspring 4.5.6 iS 'retire0.1.1. i116 Outer @13.157 0f. the perrier 14 lever |50. The trip lever|52"has a limited pivotal motion on the carrier lever, limited by theslot `|58 in the former receiving the pin |59 on the latter. A spring|50 connects the levers |50 and 52 to normally move the trip lever |52on .the carrier lever to the position shown in Fig. 4. The trip lever|52 also carries in one of its arms a trip screw lei and vmay beprovided in the other of its arms with a spring reset trip pawl |62. Thetrip lever |52 is also provided with a cam pin |63 near its trip screw|6|, which is positioned to cooperate with the small cam heretoforementioned fitted to the hub of the main cam 65.

The flexible shaft |55 Ais in turn attached to a Worm |55 (see 3)journalled .in the bracket U55, and the worm meshes with the teeth 81(forming .a worm wheel) of the main cam 66. Normally the rubber wheel 3|is disengaged from the turntable rim (Fig. l) and the main `cam is,therefore, at rest. Uit-on -a vtripping opera-tion, the rubber wheel 3iis tripped into engagement with the turntable rim and. isconsequentlyoperated thereby to impart motion, by Away of the flexibleshaft |55, worm |54, .and worm wheel 6?, to the main cam 6.5. lThe maincam continues its motion (one Yconfiplete revolution) until the rubberwheel lSi Vis again automatically disengaged `from the turntable rim.Preferably. the shaft of the Worm |55 is provided with .a small 'ilywheel i Sii Afor steadying purposes.

The parts assume the position shown in Figs. 3, li and l5 at the nnalincrement of .movement of the main cam 55 (at the end of fa recordchanging cycle). During the vincrement of movement the small cam 'li.engages and :moves the cam pin 53 causing the trip lever |52 to act asa drag bar. 'The trip lever thereby drags or pulls the carrier lever |55about its fulcrum |5| to dis- .engage the rubber Wheel 3| from theturntable rim. In doing so, the spring E55 acting on the carrier istensioned. The disengagement of the carrier wheel terminates therotation of the main cam and hence its operating cycle. rhe partsarethen in position for one of the tripping operations.

Tripping is accomplished by an incremental movement of the trip lever|52. The trip lever may be given such movement in several Ways. Inwardmovement of the tone arm C to the iinishing `'groove ci a record causesthe sweep arm 86 to engage the trip screw 15| (whichlies in its path)and then moves the trip lever |52 about its pivot on the carrier lever,against the action of the spring |69, the movement being .limited by thepin and slot |59, |58. The cam pin |63 is also thereby moved out .of thecam groove and onto the high point of the cam The previously imposeddrag on the trip lever is also thereby relieved, and the carrier lever|50 is thereby freed to move under the influence of its spring |55 tocause the rubber roller 3| to engage for driven connection to theturntable rim. The .rota-tion of the main cam is thereby begun. Thespring |50 restores the trip lever to its normal position on the carrierlever, as permitted by the .this Purpose the trip `bar '|36 is provided'with an extension'i'l'located to engage an edge of the trip lever |52and to move the same (upon depression of the reject button) in a mannersimilar to that when the trip screw l! is engaged by the sweep arm.Means is also provided to permit the trip lever to be tripped whenrecords are used having eccentric iinishing grooves which. set the tonearm oscillating at the iinish of a record. For this purpose the springreset trip pawl i2 on the trip lever is provided (see Figs. e and 5) andthe sweep lever 35 is shaped to provide a finger extension EES forengaging the same when the tone arm reaches a record eccentric iinishinggroove. An oscillation of the sweep lever thus causes tripping movementof the trip lever about its pivot.

The operation of the record changer phonograph of the present invention,under the various conditions oi service and use, will be evident fromthe description of the operation of the main component sections thereofgiven above; and therefrom it will now be apparent that all oi theobjects oi the invention above described are achieved. It will also beapparent that the inventive principles may be embodied in differentconstructional forms, the preferred form herein described and shownbeing only exemplary thereof, and, therefore, that many constructionalchanges may be made without departing from the essence and spirit of theinvention defined in the following claims.

I claim:

1. In a record changer p-honograph having a turntable, a magazine, atone arm, and a motor for operating the phonograph, an electric switch'for the motor, means for operating the switch to on and cti positions,a sweep arm xed to the tone arm and oscillatable therewith, a stopmember movable from an inactive position to intercept and stop the sweeparm on the inward sweep of the tone arm in at least the following twotone arm positions: an initial and stop position corresponding to norecord being present in the magazine and a record starting positioncorresponding to a record being present in the magazine, the sweep armhaving a part engage-able with the switch operating means for actuatingthe latter during movement of the sweep arm, and the stop member havinga part engage-able with the switch operating means for actuating thelatter during movement of the stop member.

2. The combination of claim l in which the switch operating meanscomprises two relatively movable elements. one engageable by the sweeparm part when the tone arm is in its initial and stop position and theother engageabie by the stop member part when the latter is in itsinactive position, these parts being related so that such engagement byboth the sweep arm part and the stop member part moves the switch to theofi position and disengagement of one of said switch operating elementsby either the the sweep arm part or the stop member part moves theswitch to the on position.

3. In a record changer phonograph having a turntable, a magazine, a tonearm, and a motor for operating the phonograph, an electric switch forthe motor, means embodying two relatively movable elements for operatingthe switch to on and 01T positions, a sweep arm fixed to the tone armand oscillatable therewith, a stop member movable from an inactiveposition to positions to intercept and stop the sweep arm in its inwardsweep in at least the following two tone arm positions: initial and stopposition corresponding to `no record being present inthe magazine and arecord starting position corresponding to a record being present in themagazine, the sweep arm having a part engageable with one of said switchoperating elements when the tone arm is in its initial and stopposition, and the sto-p member having a part engageable with the otherswitch operating element when the stop member is in its inactiveposition, the double engagement of said switch operating elements beingeffective for moving the switch to its olf position.

4. The combination of claim 3 in which the disengagement of one of theswitch operating elements by either the sweep arm part or the stopmember part moves the switch to the on position.

5. In a record changer phonograph having a turntable, a magazine, a tonearm, and a motor for operating the phonograph, an electric switch forthe motor, means for operating the switch to on and off positions, asweep arm fixed to the tone arm and oscillatable therewith, a stopmember movable from an inactive position to positions to intercept andstop the sweep arm in its inward sweep in at least the following twotone arm positions: initial and stop position corresponding to no recordbeing present in the magazine and a record starting positioncorresponding to a record being present in the magazine, the sweep armhaving a part engageable with the switch operating means when the tonearm is in its initial and stop position, the stop member having a partengageable with the switch operating means when the stop member is inits inactive position, the double engagement of said switch operatingmeans being effective for oving the switch to its off position, and thedisengagement of the switch operating means by either the sweep arm partor the stop member part alone being eiiective for moving the switch tothe on position, and manual means for disengaging the stop member partfrom the switch operating means to start the phonograph, manual inwardmovement of the tone arm causing the sweep arm part to disengage theswitch operating means for also starting the phonograph.

6. In a record changer phonograph having a turntable, a magazine, a tonearm, and a motor for operating the phonograph, an electric switch forthe motor, means embodying two relatively movable elements for operatingthe switch to von and off positions, a sweep arm xed to the tone arm andoscillatable therewith, a stop member movable from an inactive positionto positions to intercept and stop the sweep arm in its inward sweep inat least the following two tone arm positions: initial and stop positioncorresponding to no record being present in the magazine and a recordstarting position corresponding to a record being present in themagazine, the sweep arm having a part engageable with one of said switchoperating elements when the tone arm is in its initial and stopposition, the stop member having a part engageable with the other switchoperating element when the stop member is in its inactive position, thedouble engagement of said switch operating elements being effective formoving the switch to its off position, and the disengagement of one or"the switch operating elements by either the sweep arm part or the stopmember part alone being elective for moving the switch to the onposition, and manual means for disengaging the stop member part from itsswitch operating element to start the audace 117 phonograph, manualinward movement of the tone arm causing vthe sweep arm part to disengageits switch operating element for also start- :ing the phonograph.

;7. In a record changer phonograph having a turntable, a magazine, atone arm, and a'motor ifor operating the phonograph, an electric switch'for the motor, means embodying two ,relatively .movable levers foroperating the switch to on and-off positions, a spring connecting thelevers .to move the same to a contracted condition .and -the switch toan on position, axsweep arm iixed Atothe tone arm and oscillatabletherewith, a stop member vmovable from an .inactive position topositions to .intercept and stop the sweep arm in its vinward sweep inat least the following two tone arm positions: initial andstop positioncorresponding to no record being present in the Amagazine `and, a recordVstarting position corresponding to a record being present in themagazine, the rsweep arm having a part engageable with one of saidswitch .operating levers when Vthe tone arm is in its 'initial and stopposition, and the stop member having a part engageable with the otherswitch operating/lever when the `stop Vmember is in its inactiveposition, the double engagementoi saidswitch operating levers beingve'iective for moving 'the levers to an expanded condition against theaction of said spring Aand the switch to its off position.

`8. 'In the combination of claim '7, manual means for disengagingthestop member part from lits switch operating lever to permit thelevers 'to move to their -contracted condition to start the phonograph,`manual 'inward movement or :the

tone arm vcausing the sweep arm part to disengage-its switch operatinglever to permit the levers to move to their contracted condition Atoalso start the phonograph.

9. In a record changer phonograph having a magazine. a tone arm. a maincamand a motor for operating the phonograph, an electric switch for themotor, means .for operating the switch to on and off positions. a sweeparm'xed to the tone arm and oscillatable therewith, means whereby a.cycle .operation of said cam moves the sweep arm to and from a tone arminitial and stop position corresponding to no record being present inthe magazine, a stop member, and means whereby the` cycle movement ofsaid cam moves the stop member from and back to an inactive Dositionthesweep arm having a part engageable with the said switch operating meanswhen 'the tone arm is in its initial and stop position,.and 'the stopmember having a part engage- `Aable with the switch operating means whenAthe stopmern'oer is in its inactive position, thedouble engagement ofsaid switch operating means being effective for moving the switch to itsoi position.

'lli

the tone arm and oscillatable therewith, means v"position,j the sweeparm having. a part engageable one of said switch operating elements whenthe tone arm is in `its initial and stop position, and the stop memberhaving a part engageable with the other switch operating element whenthe stop .member is in its inactive position, the Vdouble engagement ofsaid switch operating elements being effective for moving the switch toits "o position.

11. The :combination of claim 9 in which the disengagement of the switchoperating means by either the sweep arm ypart or the stop `member partalone moves the switch to the on position.

12. In a record changer phonograph having a magazine, a tone arm, a maincam and a motor for operating the phonograph, an electric switch for themotor, means embodying two relatively movable elements for operating'the switch 'to von" and oi positions, a sweep arm iixed 'to the tonearm and oscillatable therewith, means whereby a cycle operation of ksaidcam vmoves the sweep arm to and from a tone arm initial and stopposition corresponding to no record being present in the magazine, astop member, 'means whereby the cycle movement of said cam moves thestop member from and back to an inactive position, the sweep arm havinga part engageable with one of said switch operating elements when thetone-arm is in its initial and stop position, and the stop member havinga part engageable `with the other switch operating element when vthestop member is in its inactive position, the double engagement of saidswitch .operating elements being eiiective for moving the switch toitsoff position, and the disengagement of one of the switch operatingelements by either the sweep arm part of the stop member lpart alone'being effective ,for .moving the switch to the on position, and manualmeans for disengaging .the stop member part vfrom its switch .operating.element .to start the phonograph, manual inward movement of the.tonearmcausing the sweep `arm part to-disengage its switch operatingelement for also starting the phonograph.

13. A record changer `phonograph Vcomprising' in combination, aturntable, a tone arm, a magazine for holding a sta ck of records abovethe turntable, a sweep armxed to .the tone arm and os- `cillatabletherewith, a stop lever Vmovable to intercept and stop said sweep arm, amain cam, means whereby a .cycle operation of said main cam moves thesweep arm to and from a tone arm initial position corresponding to norecord being present in the magazine and moves the stop lever from andto an inactive position, a record engaging member in the magazine, 'therecord engaging member being movable between a record engaging positionwhen a record or records is in .themagazine and a non-engaging positionwhen no record is present in the magazine, a .control member operable bythe movement of the record engaging member into its non-engagingposition for positioning the stop lever to intercept the vsweep arm intone .arm control vposition, a .motor for operating the phonograph, anelectric switch for the motor, and means for operating the switch to onand off positions, the sweep arm having a part engageable with saidswitch operating means when the tone arm is in its initial and stopposition, and the stop member having a part engageable with the switchoperating means when the stop member is in its inactive position, thedouble engagement of said switch operating means being eiiective formoving theswitch to its oi position.

.14. In the .record changerphonograph of claim- 19 13, manual means fordisengaging the stop member part from the switch operating means to movethe switch to the on position, manual inward movement of the tone armcausing the sweep arm part to disengage the switch operating means toalso move the switch to the on position.

l5. In a record changer phonograph having a turntable, a tone arm and amagazine for holding ra stack of records above the turntable, a sweeparm xed to the tone arm and osoillatable therewith, a record support anda record engaging member in the magazine, the record support beingmovable between a position to support a large record and a position tosupport a small record, the record engaging member being locatedadjacent to and being movable to and from said record support between arecord engaging position when a record or records is in the magazine anda non-engaging position when no record is pres- L 4 ent in the magazine,a movable control mechanism, means embodied in said control mechanismand means on said sweep arm engageable one with the other to eiectinterception and stopping of said sweep arm in any one of threepositions by said control mechanism, and means operable by Ythe movementof said record support into either Vof its two positions and by themovement of the engaging member into its non-engaging position forlocating said control mechanism in any one of three positions andthereby determining the interception and stopping by the control mecha-,nism of the sweep arm in any one of its three positions, the sweep armbeing therebyinterf cepted in the inward sweep of the tone arm in anyone of the following three tone arm positions: initial and stop positionwhen the record engaging member is in the non-engaging positioncorresponding to no record being present in the A, magazine, startingposition for a large record when the record support is in position tosupport a large record, and starting position for a small record whenthe record support is in position supporting a small record.

116. The record changer phonograph of claim 15, in which the saidcontrol mechanism comprises a control lever movable into any one ofthree positions, a rod connecting the record support to the controllever for moving the latter to either one of two positions responsive tothe movement of the record support, and a rod connecting the recordengaging member to the control lever for moving the latter to its thirdposition responsive to the movement of said record engaging member tothe non-engaging position.

1'7. In the record changer phonograph of claim 15, a motor foroperatingthe phonograph, an electric switch for the motor, and means foroperating the switch to on, and 01T positions,

- the said sweep arm having a part foractuating the switch operatingmeans when the tone arm is moved to and from its initial and stopposition.

18. In a record changer phonograph having a turntable, a tone arm and amagazine for holding a stack of records above the turntablef-.a

sweep arm xed to the tone arm and oscillatable therewith, a main camoperable for producingfa change of record, a stop lever controlled bysaid cam and movable in relation to said sweep arm,

' elements on said stop lever and on said sweep arm engageable to effectinterception and stopping of said sweep arm in any one of threepositions by said stop arm, a record support and a being movable betweena record engaging position when a record or records is in the magazineand a non-engaging position when no record Tis Y present in themagazine, a movable control mechanism, elements on said controlmechanism'and on said stop lever 'engageable to eiect interception andstopping of said stop lever in any one of three positions by saidcontrol mechanism; and

' means operable by the movement of said record suppor't'into either ofits two positionsl and by the movement of the engaging member into 'itsnon-engaging position for moving said' control mechanism into any one ofthree positions and thereby determining the positioning of the stoplever in any one of its three positions, the stop lever therebyintercepting the sweep arm on the inward sweep of the tone arm in anyone of the following three tone arm positions: initial and stop positionwhen the record engaging member is in the non-engaging positioncorresponding to no record being present in the magazine, starting.

position for a large record when the record support is in positionsupporting a large record, and

starting position for a small record whengthe-ree--Wr ord support is inposition supporting a small record.

19. In the record changer phonograph of claim 18, a motor for operatingthe phonograph, an electric switch for the motor, and means foroperating the switch to on and oi positions, the said sweep arm and thesaid stop lever each having a part for actuating the switch operatingmeans in their movements. KENNETH R. BENDER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

